Ivan Erwich, the man who activated the canisters and discovered the conspiracy.

Ivan Erwich: leader of this sub-cell; was secretly a plant among Beresch's hostages who was responsible for transferring out the gas canisters from the airport after Beresch's attack was used as a cover up; stabbed by Bierko

Andrei: Erwich's right hand man; devised a makeshift way to disperse the gas from the canisters; later worked directly for Bierko

Christopher Henderson: ex-mentor of Jack and former CTU director, orchestrated the murders of David Palmer, Tony Almeida, and Michelle Dessler at the behest of Jack's brother and the CEO of BXJ Technologies Graem Bauer; senior Executive of Omicron International; killed by Jack Bauer

Brennan: head of the unit that infiltrated the Presidential Estate on Christopher Henderson's order to assassinate Wayne Palmer; was later present during the exchange between Henderson and Evelyn Martin; killed by Jack Bauer

Cobb: one of the men in Brennan's squad; was knocked out by Wayne Palmer

Cooper: leader of Henderson's mercenary squad to assassinate Jack Bauer, Wayne Palmer, and Carl Mossman at the City Trust and Savings; Bauer tripped an alarm making LAPD arrive and engage Cooper and his men; Mossman and Cooper were killed in the ensuing gunfire with the LAPD and military as Bauer and Palmer eluded the scene

Stipes: leader of the mercenaries who flew alongside James Heller's car in a helicopter with orders to kill him if Henderson did not periodically contact them; killed by Curtis Manning

PresidentCharles Logan: a high level sponsor of the conspiracy; was exposed when Jack Bauer found a recording of a conversation between him and Henderson; after Miles Papazian destroyed this recording, Bauer, Chloe O'Brian, Mike Novick, Aaron Pierce, and Martha Logan worked together to expose him and remove him from office; arrested for murder and treason

Walt Cummings: Logan's Chief of Staff; involved in the early hours of the conspiracy with Nathanson; killed but framed as a suicide under orders from Graem and his associates, who planned to have him be the scapegoat of the plan from the beginning

Hank: an assassin hired by Cummings to eliminate Jack Bauer; failed, and killed by Jack; was entered into CTU by an unsuspecting Spenser Wolff

Schaeffer: Cummings' inside man within the terrorists; exposed then killed by either Ivan Erwich or his men

James Nathanson: Charles Logan's middleman and contact for Cummings; with the help of Russian Consul Anatoly Markov, he established communication with the separatists and supported Anton Beresch and his men; after being discovered, Nathanson cut a deal to gave Bauer a chip that lead to Omicron International and Henderson; killed by Ostroff's separatists

Spotter: a field operative of Nathanson who found Haas and his three men dead and was the middleman for communications between Haas and Nathanson

Conrad Haas: a trained sniper and assassin hired by James Nathanson and Christopher Henderson who killed David Palmer, bombed Michelle Dessler and Tony Almeida's car, and tried to kill Chloe O'Brian; killed in cold blood by Jack Bauer

Kohler: one of the three men working beneath Haas; pursued Chloe O'Brian; was stabbed in the neck by Jack Bauer.

Alpha 7: associate and co-conspirator of Nathanson; killed by one of Bierko's men

Anatoly Markov: Russian consul; introduced during Day 6 when Logan revealed that he was a co-conspirator in the events leading up to Day 5; he was the operative inside the Russian government who helped Nathanson establish a connection with the separatists

Justin Adams: a corrupt Secret Service agent loyal to President Logan; restrained Martha Logan; later was sent to murder Aaron Pierce, but was shot first by Martha Logan using his own gun

Miles Papazian: Homeland Security staffer; allegedly sexually harassed Shari Rothenberg several years ago; destroyed an important and incriminating audio recording of President Logan to gain favor and was rewarded with the promise of a high-ranking position at the White House; fate unknown after Logan was arrested

Graem Bauer: the leader of the four BXJ Technologies co-conspirators; directed President Logan through the cover-up in the last hours of the day; ordered Henderson to kill David Palmer and told Cheng Zhi that Jack is alive (after Logan's arrest, he was not implicated in the conspiracy and he remained at large; killed during Day 6 by his father Phillip)